Did You Know...
...Chester Carlson was a patent agent who tired of having to make multiple copies of patent applications using the only duplication method available at the time: carbon paper. In 1959 he came up with a new copying system and took it to IBM for evaluation. The "experts" at IBM determined potential sales to be only 5,000 units because people wouldn't want to use a bulky machine when they had carbon paper. Carlson's invention was the xerography process, the company founded on the system is Xerox.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 6123533 | Cavitation-free gear pump A positive displacement gear pump useful for pumping hydraulic fluid includes a drive gear and an idler gear. In a first embodiment, the drive gear has symmetrical teeth, whereas the idler gear has asymmetrical teeth. The asymmetrical teeth of the idler g... | 09/26/2000 |
| 6056894 | TN and STN liquid-crystal display TN liquid-crystal displays and supertwist liquid-crystal displays (SLCDs) having very short response times and good steepnesses and angle dependencies are obtained by using nematic liquid-crystal mixtures which comprise at least one compound of formula IA... | 05/02/2000 |
| 5520906 | Triazine derivatives with UV filter properties Triazine compounds of the formula I ##STR1## wherein Y is NH or O, R1 in each case independently of one another are a radical of the formula II ##STR2## wherein Phe is a phenylene group which is unsubstituted or substituted by 1 ... | 05/28/1996 |
| 5234871 | Vanadium- and copper-containing glasses for use as filters for light sources intended for use with night vision devices The invention relates to a glass consisting essentially of ______________________________________ P2 O5 43-59 SiO2 0-9 Al2 O3 ... | 08/10/1993 |
| 5230827 | Derivatives of 2,3-difluorobenzoic acid Derivatives of 2,3-Difluorobenzoic acid compounds of the formula I ##STR1## in which R1 and R2, independently of one another, are each an alkyl group having 1 to 15 C atoms, in which, in addition, one or two non-adjacent CH... | 07/27/1993 |
| 5227610 | Process and device for indicating an anomalous thermal stress condition in a heating surface made from glass ceramic or a comparable material A process for detecting and indicating an anomalous thermal stress condition in a heating surface made from glass ceramic or a comparable material, especially a glass ceramic cooking surface, is described, and by one or more temperature sensors, independe... | 07/13/1993 |
| 5223488 | Oxidized-type glutathione alkyl ester Presented are an oxidized-type glutathione alkyl ester represented by the formula (I). ##STR1## wherein R denotes a lower alkyl group, and a salt thereof: a method of preparing said ester which is comprised of oxidizing a reduced-type glutathion... | 06/29/1993 |
| 5204019 | 2,3-difluorobiphenyls 4-Q1 -4'-Q2 -2,3-Difluorobiphenyls wherein Q1 and Q2 independently of one another are each R or R-A1 -A2 -Z in which R (sic) alkyl having 1-15 C atoms or alkenyl having 3-15 C atoms each of whic... | 04/20/1993 |
| 5204776 | Automatic viewer and associated photoprint carrier for half-frame stereo prints An automatic viewer for half-frame stereoprints includes a base with a pair of lenses for stereoscopic viewing mounted thereon. The base has a kicking foot and picking detent projecting therethrough for engaging openings in a carrier deck upon which the h... | 04/20/1993 |
| 5202329 | Pyrimidinyloxy(thio)quinoline derivative, and agri-horticultural fungicide comprising the derivative as active ingredient Pyrimidinyloxy(thio)quinoline derivatives represented by the formula (I) which exhibit an excellent controlling effect for plant diseases and are also safe for crop plants, preparation processes of the derivatives, and agri-horticultural fungicides compri... | 04/13/1993 |
| 5199977 | Antifouling paint compositions An antifouling paint containing a copolymer including a recurring unit of the formula: ##STR1## wherein R1 is hydrogen atom, methyl or an alkoxycarbonyl, R2 is hydrogen atom or an alkoxycarbonyl, A is an acid ion-terminated pend... | 04/06/1993 |
| 5199464 | Pipeline repair sleeve assembly having heat sink groove The assembly comprises a pair of semi-circular steel shells. The inner surface of one shell forms a centrally located, circular recess and a concentric groove positioned between the recess and the side edges of the shell. A flat cylindrical annular seal e... | 04/06/1993 |
| 5200530 | Keto reduction of carbacyclin intermediates The invention relates to a new process for the reduction of 15-keto carbacyclin intermediates in the presence of cerium(III) Salts.... | 04/06/1993 |
| 5198518 | Preparation of polyorganosiloxane resins Polyorganosiloxane resins are prepared through the hydrolytic condensation of organoalkoxysilanes and/or oligomers thereof. By adding a low volatile, weakly acidic compound to the reaction mixture for adjusting the reaction mixture to pH 2-5, the alcohol ... | 03/30/1993 |
| 5198479 | Light transmissive epoxy resin compositions and optical semiconductor devices encapsulated therewith In a light transmissive epoxy resin composition comprising (A) an epoxy resin and (B) a curing agent are blended (C) an organic phosphorus anti-discoloring agent and (D) silica-titania glass beads surface treated with an organic silicon compound. The comp... | 03/30/1993 |
| 5198149 | Smectic liquid-crystal medium Chiral, tilted, smectic liquid-crystal phases containing at least two liquid-crystal components and at least one chiral doping agent, at least one liquid-crystal component being a compound having the structural unit 2,3-difluoro-1,4-phenylene, are disting... | 03/30/1993 |
| 5198553 | Process for the production of gramine derivatives A process for the production of gramine derivatives is described, which is characterized in that an indole is reacted with an imine under acid catalysis in the presence of primary amines.... | 03/30/1993 |
| 5196557 | Organic silicon compounds and method for making Organic silicon compounds of formula (1) are novel: ##STR1## In the formula, R1, R2 and R3 are monovalent C1-8 hydrocarbon group, R4 is a C1-6 alkyl group, R5 is a C2-6... | 03/23/1993 |
| 5196317 | Overexpression of proteins in recombinant host cells The invention relates to a process for achieving high, thermally-induced expression rates, which last for a relatively long period of time, of proteins in recombinant cells, preferably in E. coli cells, by optimizing cell density, induction temperature an... | 03/23/1993 |
| 5196231 | Optical recording media Disclosed are optical recording media, each of which is composed of a substrate and a recording layer formed on the substrate. The recording layer includes an organic-dye-containing layer and an organopolysiloxane resin layer formed by the condensation of... | 03/23/1993 |
| 5196153 | Process and apparatus for securing a grip element to crockery or pottery A process and apparaus are provided for securing a grip element or handle, preferably of plastic, to a crockery or pottery article. An adhesive is injected under pressure into a passage in the grip element and flows to the surface to be joined to the arti... | 03/23/1993 |
| 5196141 | 5-oxy-2-phenylpyridines, and a liquid-crystalline medium The invention relates to 5-oxy-2-phenylpyridines of the formula I ##STR1## in which m and n, independently of one another, are each from 1 to 18, Q1 is --O--, trans-1,4-cyclohexylene, 1,4-phenylene or a single bond, and Q2 is --CO--,... | 03/23/1993 |
| 5196140 | Electro-optical liquid crystal display element The invention relates to an electro-optical liquid crystal display element containing a dielectric with at least two liquid-crystalline components, wherein the dielectric, for shortening the switching times, contains at least one fluorine-containing compo... | 03/23/1993 |
| 5195520 | Ultrasonic manometry process in a fluid by means of microbubbles The invention relates to an ultrasonic manometry process in a fluid containing stabilized micro bubbles in an ensemble, wherein ultrasonic impulses are radiated into the fluid and brought to interact with the micro bubbles. The amplitude and/or frequency ... | 03/23/1993 |
| 5196570 | Leukotriene-B4 derivatives, process for their production and their use as pharmaceutical agents The invention relates to new leukotriene-B4 analogs of formula I, ##STR1## in which R1 means radicals CH2 OH, CH3, CF3, COOR4, or radical CONHR5, A means a trans, trans--CH.dbd.C... | 03/23/1993 |
| 5196558 | Siloxane compounds Novel siloxane compounds are provided which have 1-5 hydrogen atoms each attached to a silicon atom (SiH group) and 1-5 epoxy or alkoxy - containing organic groups each attached to a silicon atom in a molecule. These siloxane compounds are useful tackifie... | 03/23/1993 |
| 5194885 | Methods of, apparatus for, and a camera capable of automatically selecting an optimal angle for bounce illumination The angle "" which an illumination axis of an illuminator, such as a flash illuminator, assumes with respect to the optical axis of a camera in a bounce flash mode is selected in accordance with the equation: =Tan-1 (2H/D) wherein; H=t... | 03/16/1993 |
| 5194676 | Catalyst and process for the synthesis of saturated carboxylic esters Saturated carboxylic esters are produced from alkyl formate and an olefin, without the presence of substantial amounts of carbon monoxide, at a temperature of 120° to 280° C., under a pressure of 1 to 3,000 bars, in the presence of a catalyst based on r... | 03/16/1993 |
| 5194655 | Polymerizable carbonates having ethylenic and acetylenic functions A carbonate compound having ethylenically unsaturated and acetylenically unsaturated functions are disclosed. The compound is represented by the formula: ##STR1## wherein, A is the residue of a hydroxy group-containing, ethylenically unsaturated... | 03/16/1993 |
| 5194653 | Carbonates of acetylenic alcohols Polymerizable carbonate compounds of the formula: ##STR1## wherein A is an aromatic polycycle, R1 and R2 are independently hydrogen atom or alkyl, and n is 1, 2 or 3, are disclosed. They are useful as a component of nonemanating... | 03/16/1993 |
| 5194647 | Organic silicon compounds and method for making Organic silicon compounds of formula (1) are novel. ##STR1## In the formula, wherein R1 and R2 are monovalent C1-8 hydrocarbon group, R3 is a C2-6 alkylene group or a C2-6 alkylene gro... | 03/16/1993 |
| 5194632 | Fluoran compound, useful in heat sensitive recording materials Disclosed are a novel fluoran compound represented by the formula (I): ##STR1## and a heat-sensitive recording paper which is obtained by using the fluoran compound as a chromogenic compound and is excellent in preserving stability.... | 03/16/1993 |
| 5194576 | Melt production of a thermoplastically processible aromatic polyamide with phosphorus compound catalyst and metal salt catalyst Aromatic polyamides with an improved stability toward thermal oxidation was achieved by polycondensation being performed in the presence of 0.05 to 4 mol % of a catalyst comprising a mixture of phosphorus compounds and metal salts. With the process accord... | 03/16/1993 |
| 5194398 | Semiconductor film and process for its production A method for forming an amorphous semiconductor film, which comprises (a) a film-forming step of forming a semiconductor film having not more than 20 atomic percent of bound hydrogen to a thickness of 3 to 1000 Å, and (b) a modifying step of modifying th... | 03/16/1993 |
| 5194225 | Chromatography column cartridge system A chromatography column cartridge system comprised of an internal pressure-stable precision glass tube which can be filled with adsorbent and an external protection and/or temperature control jacket with column connection parts which can be screwed on. Th... | 03/16/1993 |
| 5194178 | Chloro tolanes Chloro tolanes of the formula I ##STR1## wherein R1 denotes alkyl with up to 12 carbon atoms wherein one or two non-adjacent CH2 groups may also be replaced by --O--, --O--CO--, --CO--O-- and/or --CH.dbd.CH--, A is trans-1,4-cyc... | 03/16/1993 |
| 5194071 | Cubic boron nitride abrasive and process for preparing same The present invention provides methods for forming cubic boron nitride from large particle ideal structure hexagonal boron nitride. Large particles provide improved packing density within the high pressure, high temperature equipment utilized, providing h... | 03/16/1993 |
| 5193709 | Filter for hazardous waste containers A filtered vent useful for venting drums, such as 55-gallon drums, includes a cylindrical housing having an anular activated carbon filter cartridge disposed therein. The cylindrical housing has a threaded collar with vents at one end and a pressure relie... | 03/16/1993 |
| 5194541 | Acrylic copolymers and their application to the coating of bituminous materials Acrylic copolymer comprising, per 100 parts by weight: approximately from 2 to 65 parts by weight of at least one polyoxyether (meth)acrylate of formula: ##STR1## in which: R1 is a methyl radical or a hydrogen atom, R2 is a hydrocar... | 03/16/1993 |
| 5192778 | Dialkoxymethylimidazolidine derivatives, preparation thereof, insecticides containing same as an effective ingredient and intermediates therefor Novel dialkoxymethylimidazolidine derivatives of the formula (1) ##STR1## are described. Also, a preparation process of the derivatives and insecticidal compositions comprising the same are set forth. In addition, novel intermediate compounds of the ... | 03/09/1993 |
